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AJ55TB2-4R Mitsubishi MELSEC-I/OLINK remote I/O module
Discontinued by Mitsubishi Electric (Factory Automation) — we can still source the original AJ55TB2-4R (new, used or refurbished, subject to availability). Request a quote below.
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Quick facts
| Availability | Confirmed on request |
| Category | Mitsubishi MELSEC I/OLINK, MELSECNET & A-Series Network Modules |
| Lifecycle | Discontinued |
| Warranty | 12-month (new) · 3-month (used/refurbished) |
| Recommended replacement | A20PB-04RS, CL1Y4-R1B2 |
Shipping & availability
Can I still buy the AJ55TB2-4R now that it is discontinued?
Yes. Mitsubishi Electric (Factory Automation) has discontinued the AJ55TB2-4R, but sourcing discontinued parts is what PartnerPLC specialises in — new old stock, used and refurbished units. Request a quote and we'll confirm availability, condition and lead time. If you are planning an upgrade instead, Mitsubishi Electric (Factory Automation) names the A20PB-04RS as its successor — we can quote both.
When can AJ55TB2-4R be shipped?
AJ55TB2-4R is sourced on request — request a quote and we'll confirm the exact availability and shipping timeline for this specific unit.
Can I pick up AJ55TB2-4R in person?
Local pickup from our Groningen, Netherlands warehouse may be possible — contact us before ordering to check availability and arrange a collection time.
Is express delivery available?
Yes — mention it when you request a quote for AJ55TB2-4R and we'll include express shipping options in our reply.
My factory is down and I need this urgently — can you help?
For a critical breakdown, contact us directly at +31 (0)50-7110348 or sales@partnerplc.com — we can look into same-day courier or dedicated taxi/hotshot delivery for AJ55TB2-4R, subject to availability and destination.
Mitsubishi Electric AJ55TB2-4R — MELSEC-I/OLINK remote I/O module, MELSEC-A Series network / I/OLINK. Discontinued by Mitsubishi Electric. Mitsubishi names A20PB-04RS, CL1Y4-R1B2 as alternative. PartnerPLC sources discontinued and surplus Mitsubishi MELSEC parts — request a quote for price, condition and lead time.
Specifications
Product
| Lifecycle | Discontinued by Mitsubishi Electric |
| Series | MELSEC-A Series network / I/OLINK |
| Product type | MELSEC-I/OLINK remote I/O module |
| Mitsubishi technical bulletin | FA-A-0142-C |
| Mitsubishi alternative model(s) | A20PB-04RS, CL1Y4-R1B2 |
Transition notes to A20PB-04RS (Mitsubishi)
| Note 1 | 1) External wiring: Changed |
| Note 2 | 2) Number of modules: Not changed |
| Note 3 | 3) Program: Changed |
| Note 4 | 4) Specifications: |
| Note 5 | Rated input voltage: Changed (The voltage that can be used is equivalent.) |
| Note 6 | Rated input current: Not changed |
| Note 7 | Maximum switching frequency: Changed (3600 times/hour 20 times/minute) |
| Note 8 | 5) Functions: Changed (4 points/common All points independent) |
| Note 9 | [ 70/80] |
| Note 10 | 1) External wiring: Changed |
| Note 11 | 2) Number of modules: Not changed |
| Note 12 | 3) Program: |
| Note 13 | Number of occupied I/O points: Not changed. (in 4-point mode) |
| Note 14 | 4) Specifications: |
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